ic015604y_si_001.cif (40.16 kB)
fac-[FeII(CN)3(CO)3]- and cis-[FeII(CN)4(CO)2]2-: New Members of the Class of [FeII(CN)x(CO)y] Compounds
dataset
posted on 2001-12-22, 00:00 authored by Jianfeng Jiang, Stephen A. KochThe reaction of Fe(CO)4I2 with NaCN or KCN in methanol gives
M[FeII(CN)3(CO)3] (M = Na, K), which can be converted to [Ph4E][FeII(CN)3(CO)3] (E = P, As). The structure of the fac-[FeII(CN)3(CO)3]- (1) anion was established by the X-ray crystal structures
of K-1 and [Ph4As]-1·H2O. Compound 1 has also been characterized by IR, Raman, and 13C NMR. The coupling of the CO and
CN stretching modes in the vibrational spectra of 1 have been
analyzed. The reaction of Na-1 with NaCN gives Na2 cis-[FeII(CN)4(CO)2] (Na-2), which has been structurally characterized as
[Ph4P][Et4N]-2. Compounds 1 and 2 are additional members of
the series of compounds of general formula [FeII(CN)(6-x)(CO)x](x-4).
[Fe(CN)x(CO)y] compounds are of interest due to the occurrence
of such coordination modes in hydrogenase enzymes.
